dancing seige weapons.

[phallic khan]

any suggestions on making them easier to transport?

[MrSin]

Shrink item and permenancy. What happens if you put transformative on a ballista?

[phallic khan]

it can become any type of seige weapon you want

[MrSin]

Shrink weapon is the go to thing I think. I don't think I've ever seen one in a game. Beyond that I think its homebrew territory.

[Nefreet]

Keep in mind that the Dancing special ability can only be placed on melee weapons, so a +1 Dancing Battering Ram is probably your only option.